﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Web;
using System.Net;
using System.IO;
using System.Web.Services.Description;
using System.CodeDom;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.Reflection;


public class WSHelper
{

    ///    /// < summary>          
    /// 动态调用web服务 
    /// < /summary>          
    /// < param name="url">WSDL服务地址< /param>
    /// < param name="classname">类名< /param>  
    /// < param name="methodname">方法名< /param>  
    /// < param name="args">参数< /param> 
    /// < returns>< /returns>
    public static object InvokeWebService(string url, string classname, string methodname, object[] args)
    {
        string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
        if ((classname == null) || (classname == ""))
        {
            classname = WSHelper.GetWsClassName(url);
        }
        try
        {                   //获取WSDL   
            WebClient wc = new WebClient();
            Stream stream = wc.OpenRead(url + "?WSDL");
            ServiceDescription sd = ServiceDescription.Read(stream);
            ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
            sdi.AddServiceDescription(sd, "", "");
            CodeNamespace cn = new CodeNamespace(@namespace);
            //生成客户端代理类代码          
            CodeCompileUnit ccu = new CodeCompileUnit();
            ccu.Namespaces.Add(cn);
            sdi.Import(cn, ccu);
            CSharpCodeProvider icc = new CSharpCodeProvider();
            //设定编译参数                 
            CompilerParameters cplist = new CompilerParameters();
            cplist.GenerateExecutable = false;
            cplist.GenerateInMemory = true;
            cplist.ReferencedAssemblies.Add("System.dll");
            cplist.ReferencedAssemblies.Add("System.XML.dll");
            cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
            cplist.ReferencedAssemblies.Add("System.Data.dll");
            //编译代理类                 
            CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);
            if (true == cr.Errors.HasErrors)
            {
                System.Text.StringBuilder sb = new System.Text.StringBuilder();
                foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
                {
                    sb.Append(ce.ToString());
                    sb.Append(System.Environment.NewLine);
                }
                throw new Exception(sb.ToString());
            }
            //生成代理实例，并调用方法   
            System.Reflection.Assembly assembly = cr.CompiledAssembly;
            Type t = assembly.GetType(@namespace + "." + classname, true, true);
            object obj = Activator.CreateInstance(t);
            System.Reflection.MethodInfo mi = t.GetMethod(methodname);
            return mi.Invoke(obj, args);
        }
        catch (Exception ex)
        {
            throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
        }
    }
    private static string GetWsClassName(string wsUrl)
    {
        string[] parts = wsUrl.Split('/');
        string[] pps = parts[parts.Length - 1].Split('.');
        return pps[0];
    }
}
